Viewport class definition doesn't work

[Zsombor]

Hi,

I'm working on a quite big project, now the vwx file is 230MB, with lots of layers and classes. Viewport class definition doesn't work, it even starts to struggle, when I want to edit class definition (freezes for a while), then it just doesn't changes anything in the viewport. The object's appearence are linked to class definition. 

If I open an empty file, it works fine.

Do you know a trick what to do in this case?

I had a try with purging, but no effect.

 

Landmark 2022 SP3.1

 

THX.

 

[Zsombor]

SOrry, that was my mistake, everything was linked to  class style but color!

 

[Zsombor]

This time it really fails. In class preferences I have an image fill, everything is linked to class in my landscape area setup, and nothing happens when I change it to a simple color fill in the viewport class setup.  I have materials for my landscape area components but textures are linked to class also here.